Extra Solids Acrylic Urethane Clearcoat Activators are specifically designed for high productivity shops using Transtar Finish-Tec® Clearcoats. Activators are suitable for use in clearcoat applications over single stage topcoats and for base/clear applications (except lacquers). #6894HT/6897HT, Hi Temp Activator is designed for use on larger jobs in temperatures above 90°F (32 °F).